I saw on the open pandora that they now have a 3d renderer for the emulator, which increases the LOD of the game and make it look better. i was recently playing through spyro 1-3, and I noticed that the enviromental textures are the _only_ big/huge thing that irks me. The texures on characters are perfect, but the enviorment are kinda blocky.
I don't know how feasible this is, but I'm pretty sure it should be possible, I just don't know how complex it'd be to do, since I've seen other emulators doing MSAA/other such things for textures that weren't part of the game originally(admittedly for ps2/gc/wii)
Edit: Yes I realize this is kinda a "first world problem" but I'd love it to be possible and I'd put some money behind getting that feature since it'd really make the games look perfect 24/7/365.